ROADM systems and methods of operation

Abstract

ROADM node systems and methods of operation are disclosed. ROADM node systems may include transponder aggregators including transponders to add signals for switching through the ROADM node. The transponder aggregators include optical couplers constrained that are from coupling added signals on adjacent channels for simultaneous use. The ROADM system may include an optical interleaver that can provide an additional filtering function for the coupled signals prior to transmission of the signals on a WDM network.

Description

[0001] Related application information [0002] This application claims priority to Provisional Application Serial No. 61 / 326,432, filed April 21, 2010, which is hereby incorporated by reference. technical field [0003] The present application relates to reconfigurable optical add / drop multiplexer (ROADM) systems and methods of operation, and in particular to managing add signals in ROADM nodes. [0004] This application is also related to commonly owned co-pending application serial number 12 / 718,145 filed March 5, 2010 and commonly owned provisional application serial number 61 / 250,185 filed October 9, 2009, which Each of the documents is hereby incorporated by reference. Background technique [0005] A reconfigurable optical add-drop multiplexer (ROADM) node is an important optical network element that allows flexible insertion and drop at the wavelength layer on any or all wavelength division multiplexing (WDM) channels Signal. A multi-degree ROADM node (MD-ROADM), ...

AI Technical Summary

Problems solved by technology

Although conventional ROADM nodes have some degree of flexibility to add and drop signals on WDM channels, they are not flexible enough to accommodate the rapid growth and increasingly dynamic Internet-based traffic

For example, transponders of conventional ROADM nodes typically do not have non-blocking and wavelength-transparent access to all Dense Wavelength Division Multiplexing (DWDM) network ports

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